【问题情境】如图,在
中,
,
,
是
边上的高,点E是
上一点,连接
,过点A作
于F,交
于点G.
时,求证:
;
(2)【类比探究】如图2,当
时,(1)中的结论是否还成立?若成立,请写出证明过程,若不成立,请指出此时
与
的数量关系,并说明理由;
(3)【拓展运用】如图3,连接
,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cfd2a95ad9cf4d9e236bdaa754f719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a598a35e6a4bfb3a5f08b55b70bdc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46d93b877d359a4218e156b46d5aa3e.png)
(2)【类比探究】如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c525393775354325cbf7839366ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(3)【拓展运用】如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f2f91aa5dea19712561c7905535d15b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767a8eafa46bb877d2591b7b13d23e8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
2024·湖北孝感·一模 查看更多[6]
更新时间:2024-03-31 08:52:02
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】已知:如图,点E在线段CD上,EA、EB分别平分∠DAB和∠ABC,∠AEB=90°,
设AD=x,BC=y,且(x﹣2)2+|y﹣5|=0.
(1)求AD和BC的长.
(2)试说线段AD与BC有怎样的位置关系?并证明你的结论.
(3)你能求出AB的长吗?若能,请写出推理过程,若不能,说明理由.
设AD=x,BC=y,且(x﹣2)2+|y﹣5|=0.
(1)求AD和BC的长.
(2)试说线段AD与BC有怎样的位置关系?并证明你的结论.
(3)你能求出AB的长吗?若能,请写出推理过程,若不能,说明理由.
![](https://img.xkw.com/dksih/QBM/2021/10/17/2831075157139456/2837019260190720/STEM/f7db2f1e-1053-4773-bf01-2bea3f8d5387.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】综合与实践
在数学活动课上,老师给出
,
,
.点
为
的中点,点
在射线
上运动,将线段
绕点
逆时针旋转90°得到线段
,连接
,
.过点
作
,交直线
于点
.
(1)若点
在线段
上,如图1,
①根据题意补全图1(不要求尺规作图);
②判断
与
的数量关系并加以证明;
(2)若点
为线段
的延长线上一点,如图2,且
,
,补全图2,求
的面积.
在数学活动课上,老师给出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a355958abf7dc0f2eb949584cb87907b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67e4abf5ad77926b33250de63614e23e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
①根据题意补全图1(不要求尺规作图);
②判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3589513e8ab4066a42b626b45b2bb1d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252ac0fb99092c9d2e3d8f3f769e78de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/11/aa2c93a0-0cbd-4864-8496-ecd100a58f1e.jpg?resizew=309)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】我们已经知道,有一个内角是直角的三角形是直角三角形.其中直角所在的两条边叫直角边,直角所对的边叫斜边(如图①所示).数学家已发现在一个直角三角形中,两个直角边边长的平方和等于斜边长的平方.如果设直角三角形的两条直角边长度分别是
和
,斜边长度是
,那么可以用数学语言表达:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/17/7d417580-9ab0-4875-8bc3-cc16588a54d9.png?resizew=460)
(1)在图②,若
,
,则
;
(2)观察图②,利用面积与代数恒等式的关系,试说明
的正确性.其中两个相同的直角三角形边
、
在一条直线上;
(3)如图③所示,折叠长方形
的一边
,使点
落在
边的点
处,已知
,
,利用上面的结论求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3133ef62aad6bdd6637140620f068fad.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/17/7d417580-9ab0-4875-8bc3-cc16588a54d9.png?resizew=460)
(1)在图②,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e15cbd7c42d7b15d7ba8d2b28ab8df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c847d3c0cd295c9ffd602e1fca9564.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)观察图②,利用面积与代数恒等式的关系,试说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3133ef62aad6bdd6637140620f068fad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
(3)如图③所示,折叠长方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b8a4b0e72a4de1da975168b243a325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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解答题-作图题
|
适中
(0.65)
【推荐2】已知:如图,在
中,
,请利用没有刻度的直尺和圆规,按下列要求作图(注:不写作法,保留作图痕迹,对图中涉及到的点用字母进行标注).
(1)在斜边
边上找一点D,连接
,使得
;
(2)过A作一射线分别交线段
,线段
于点P,点Q,且使得
;
(3)在(1)、(2)条件下,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/16/d4931325-9078-42cc-8f21-75c8d319b9e5.png?resizew=253)
(1)在斜边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59959580574c33c1fe667a44cea32eba.png)
(2)过A作一射线分别交线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/378ab247cf28dd1b17d48a508fa92176.png)
(3)在(1)、(2)条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6623de5abdeae42cb02348563ff103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,点
分别在
上,
,
,
,
与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/283c9a5e-2b35-4c7a-8290-4dd1d7d11152.png?resizew=194)
(1)求证:
;
(2)连接
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a898391acfefad6656a81913f51d0255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942e6dafcfcbf0682856b9f25178694d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7749006d7e99bbec95b12e044bf8f87b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/121e9b7080514f5a33858d72e28d60a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/552b408e6f1245b33f1fa77fc91ed432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/283c9a5e-2b35-4c7a-8290-4dd1d7d11152.png?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07d82f0ed6436baddf2be53d2d759ea.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/687c573937c56f12cc3b94d711a969c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e36bc6d2fe5d3f5c762740c320d2973.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知,如图,在矩形
中,
,点
是线段
的中点,连接
,直线
上有一点
,连接
,线段
绕点
顺时针旋转
得到线段
,连接
.
在直线
上时,
的值为______;
(2)如图2、3,当点
不在直线
上时,请写出
的值,并证明图
结论;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151f7aef7d0f56e18562f5a4030cf815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a0387fc1258f31e44a10068c0ccfd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87448e09eaa816e50ae92d111d5ded6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be705a04d5aaec2f9e913ae604b8912c.png)
(2)如图2、3,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be705a04d5aaec2f9e913ae604b8912c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
您最近一年使用:0次